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ASF GitHub Bot commented on FLINK-8360:
---------------------------------------
Github user tillrohrmann commented on a diff in the pull request:
https://github.com/apache/flink/pull/5239#discussion_r165112749
--- Diff: flink-runtime/src/main/java/org/apache/flink/runtime/state/StateSnapshotContextSynchronousImpl.java
---
@@ -130,7 +136,7 @@ public OperatorStateCheckpointOutputStream getRawOperatorStateOutput()
throws Ex
}
private <T extends StreamStateHandle> void closeAndUnregisterStream(
- NonClosingCheckpointOutputStream<T> stream) throws IOException {
+ NonClosingCheckpointOutputStream<? extends T> stream) throws IOException {
--- End diff --
Should be sufficient to have `NonClosingCheckpointOutputStream<? extends StreamStateHandle>`
> Implement task-local state recovery
> -----------------------------------
>
> Key: FLINK-8360
> URL: https://issues.apache.org/jira/browse/FLINK-8360
> Project: Flink
> Issue Type: New Feature
> Components: State Backends, Checkpointing
> Reporter: Stefan Richter
> Assignee: Stefan Richter
> Priority: Major
> Fix For: 1.5.0
>
>
> This issue tracks the development of recovery from task-local state. The main idea is
to have a secondary, local copy of the checkpointed state, while there is still a primary
copy in DFS that we report to the checkpoint coordinator.
> Recovery can attempt to restore from the secondary local copy, if available, to save
network bandwidth. This requires that the assignment from tasks to slots is as sticky is possible.
> For starters, we will implement this feature for all managed keyed states and can easily
enhance it to all other state types (e.g. operator state) later.
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